Teeeitoey



(No Model.)

B. A. WALL.

ORUSHING ROLL.

No. 372,583. Patented Nov. 1, 1887.

WITJWESSES IJV'VENTOR .dttorneys UNITED STATES PATENT OFFICE,

EN OS A. \VALL, OF SALT LAKE CITY, UTAH TERRITORY.

CRUSHING=ROLL.

SPECIFICATION forming part of Letters Patent No. 372,583, dated November 1, 1887.

Application filed February 5, 1887. Serial No. 226,683.

ing my improvements.

My present invention relates to crushingrolls, and is an improvement on my former patent, No. 332,978, issued to me December 22, 1885; and it consists in the peculiar construction and combination of parts which I shall hereinafter fully describe and claim.

To enable others skilled in the art to which my invention appertains to make and use the same, I will now describe its construction and indicate the manner in which the same is carried out.

In the said drawing, A represents a frame Work, within which the crushing-rolls B Gare suitably mounted. These rolls B G are fluted or corrugated in lines parallel with or inclined to their axis, as shown in my said former patent.

The shell of each of the rollers B G has an interior configuration corresponding with its exterior surface, and is placed upon and suitably secured to each of the cores D, of soft cast metal, whose outer surfaces are corrugated to (No model.)

correspond with the inner surfaces of said shells. These soft-metal cores are bored to receive shafts E,with which they rotate, being secured thereto by any well-known means. From this construction it will be seen that I am enabled to provide each roller with a corrugated shell, which will be available for service until nearly worn through before being replaced by a new one.

In the construction illustrated in my former patent,above referred to,it has been found that the metal between the bottom of the grooved portion of the roll and the cylindrical core was quickly worn through, thereby leaving the intervening portion of the metal composing the ribbed portion of the shell to be castaside, causing greater loss of material, 850. In the present case this loss of material is avoided,

as the thickness of metal is the same at all interior and exterior surface corrugated, of

an externally-corrugated soft cast-metal core engaging said shell, and having a cylindrical bore, substantially as herein described.

ENOS A. WALL.

Witnesses:

W. S. McCoRMIoK, CHRISTOPHER DIEHL. 

